DE69433890D1 - Device for controlling magnetic heads and magnetic recording device with such a device - Google Patents

Device for controlling magnetic heads and magnetic recording device with such a device

Info

Publication number
DE69433890D1
DE69433890D1 DE69433890T DE69433890T DE69433890D1 DE 69433890 D1 DE69433890 D1 DE 69433890D1 DE 69433890 T DE69433890 T DE 69433890T DE 69433890 T DE69433890 T DE 69433890T DE 69433890 D1 DE69433890 D1 DE 69433890D1
Authority
DE
Germany
Prior art keywords
controlling
magnetic recording
magnetic
magnetic heads
heads
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE69433890T
Other languages
German (de)
Other versions
DE69433890T2 (en
Inventor
Kazuyoshi Ishii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Application granted granted Critical
Publication of DE69433890D1 publication Critical patent/DE69433890D1/en
Publication of DE69433890T2 publication Critical patent/DE69433890T2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/022—H-Bridge head driver circuit, the "H" configuration allowing to inverse the current direction in the head
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/10504—Recording
    • G11B11/10508—Recording by modulating only the magnetic field at the transducer
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
    • H03K17/6871—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor
DE69433890T 1993-08-06 1994-08-05 Device for controlling magnetic heads and magnetic recording device with such a device Expired - Lifetime DE69433890T2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP05213550A JP3107265B2 (en) 1993-08-06 1993-08-06 Magnetic head drive device and magnetic recording device
JP21355093 1993-08-06

Publications (2)

Publication Number Publication Date
DE69433890D1 true DE69433890D1 (en) 2004-08-12
DE69433890T2 DE69433890T2 (en) 2005-06-30

Family

ID=16641062

Family Applications (2)

Application Number Title Priority Date Filing Date
DE69426218T Expired - Lifetime DE69426218T2 (en) 1993-08-06 1994-08-05 Device for controlling magnetic heads and magnetic recording device with such a device
DE69433890T Expired - Lifetime DE69433890T2 (en) 1993-08-06 1994-08-05 Device for controlling magnetic heads and magnetic recording device with such a device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE69426218T Expired - Lifetime DE69426218T2 (en) 1993-08-06 1994-08-05 Device for controlling magnetic heads and magnetic recording device with such a device

Country Status (4)

Country Link
US (1) US5574702A (en)
EP (2) EP1006519B1 (en)
JP (1) JP3107265B2 (en)
DE (2) DE69426218T2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0183824B1 (en) * 1995-08-16 1999-04-15 김광호 Magnetic record apparatus and method thereof
JPH1097702A (en) * 1996-09-20 1998-04-14 Toshiba Corp Magnetic disk unit and data reproducing circuit applied to the same
US5852526A (en) * 1996-09-25 1998-12-22 Silicon Systems, Inc. Low bias voltage write driver using a low bias voltage to reduce the risk of head arcing
JPH1186203A (en) * 1997-09-03 1999-03-30 Canon Inc Magnetic head driving device and magneto-optical recording device
DE19930513A1 (en) * 1999-07-05 2001-01-11 Thomson Brandt Gmbh Photodetector-based scanning device e.g. for optical recording carriers, such as CD and DVD, has voltage control circuit based on operational amplifier and MOSFET elements
JP2001176142A (en) 1999-12-16 2001-06-29 Canon Inc Magnetic head drive circuit and magneto-optical recorder
US6847500B2 (en) * 2001-09-06 2005-01-25 Hitachi Global Storage Technologies Netherlands B.V. Methods and apparatus for gradually decreasing supply current demand in arm electronics for write-to-read transitions
US7085089B2 (en) * 2003-04-01 2006-08-01 Agere Systems Inc. System and method for reducing circumferential transition incoherence in servowriting operations and magnetic disk drive incorporating the same
CA2541234C (en) 2003-12-31 2014-04-15 Boston Scientific Limited Medical device with varying physical properties and method for forming same
US7092185B2 (en) * 2004-07-08 2006-08-15 Agere Systems Inc. Write gate timing for a servo bank

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0743805B2 (en) * 1986-10-07 1995-05-15 ソニー株式会社 Magnetic head drive circuit
JPS63244402A (en) * 1987-03-31 1988-10-11 Sony Corp Magnetic field generating circuit for recording
DE3836125A1 (en) * 1988-10-22 1990-05-03 Thomson Brandt Gmbh CIRCUIT ARRANGEMENT FOR REVERSING A MAGNETIC FIELD
US5107151A (en) * 1989-08-22 1992-04-21 Unique Mobility, Inc. Switching circuit employing electronic devices in series with an inductor to avoid commutation breakdown and extending the current range of switching circuits by using igbt devices in place of mosfets
JP3097088B2 (en) * 1989-12-27 2000-10-10 ソニー株式会社 Magnetic head drive circuit
DE4022410A1 (en) * 1990-07-13 1992-01-16 Thomson Brandt Gmbh Magnetic field reversing circuit with coil - couples inductance terminal to supply voltage source pole via third controllable switch
JP2795757B2 (en) * 1991-06-21 1998-09-10 シャープ株式会社 Magnetic head drive circuit
JP2889411B2 (en) * 1991-10-31 1999-05-10 キヤノン株式会社 Magnetic head drive
JP2871924B2 (en) * 1991-12-19 1999-03-17 キヤノン株式会社 Magnetic head drive
JP2859766B2 (en) * 1991-12-24 1999-02-24 シャープ株式会社 Magnetic head drive circuit
JP2976697B2 (en) * 1992-05-29 1999-11-10 松下電器産業株式会社 Modulated magnetic field generator for magneto-optical disks
JP3098896B2 (en) * 1992-06-23 2000-10-16 キヤノン株式会社 Magneto-optical recording device

Also Published As

Publication number Publication date
DE69433890T2 (en) 2005-06-30
US5574702A (en) 1996-11-12
JP3107265B2 (en) 2000-11-06
EP1006519A3 (en) 2000-10-11
DE69426218T2 (en) 2001-04-26
EP0637822A2 (en) 1995-02-08
EP1006519B1 (en) 2004-07-07
EP1006519A2 (en) 2000-06-07
JPH0757202A (en) 1995-03-03
EP0637822B1 (en) 2000-11-02
EP0637822A3 (en) 1995-08-02
DE69426218D1 (en) 2000-12-07

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition